Explore topic-wise MCQs in Analog Circuits.

This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Analog Circuits knowledge and support exam preparation. Choose a topic below to get started.

1.

If channel length modulation is neglected, what is the overall voltage gain of the following circuit?

A. – {gm1 * (Rd || 1/gm2) * (Rd1/ (1/gm2 + Rd))}
B. – {gm1 * (Rd || 1/gm2) * gm2 * 2Rd1}
C. – {gm1 * Rd * gm2 * Rd1}
D. )}b) – {gm1 * (Rd || 1/gm2) * gm2 * 2Rd1}c) – {gm1 * Rd * gm2 * Rd1}d) – {gm1 * 1/gm2 * gm2 * Rd1}
Answer» B. – {gm1 * (Rd || 1/gm2) * gm2 * 2Rd1}
Discussion
2.

If channel length modulation is neglected, what is the voltage gain for the following circuit?

A. – {gm1 * Rd * Rd / (1/gm2 + Rs)}
B. – (gm1 * 2Rd * Rd / Rs)
C. – {gm1 * Rd * Rd / (1/gm2 + Rs)}
D. – {gm1 * Rd * Rd / (1/gm2 + 2Rs)}
Answer» B. – (gm1 * 2Rd * Rd / Rs)
Discussion
3.

If channel length modulation is present, what is the voltage gain of the following circuit?

A. gm1 * (Rd || ro1) * gm2 * Rd1
B. – {gm1 * Rd * gm2 * 2(Rd1 || ro2)}
C. – {gm1 * (Rd || ro1) * gm2 * (Rd1 || ro2)}
D. gm1 * 2Rd * gm2 * Rd1
Answer» D. gm1 * 2Rd * gm2 * Rd1
Discussion
4.

If channel length modulation is neglected, what is the voltage gain of the following circuit?

A. – {gm1 * Rd * gm2 * Rd1}
B. gm1 * Rd * gm2 * 2Rd1
C. – {gm1 * Rd * 2gm2 * Rd1}
D. gm1 * 2Rd * gm2 * Rd1
Answer» B. gm1 * Rd * gm2 * 2Rd1
Discussion
5.

The voltage gain of a simple CG stage is greater than that of a follower.

A. True
B. False
Answer» B. False
Discussion
6.

The current gain of a simple CG stage is approximate ____________

A. Infinity
B. unity
C. twice
D. 0
Answer» C. twice
Discussion
7.

If channel length modulation is present. what is the overall output impedance of the following CG stage?

A. Rd || {Rs*(1+gm * ro) + ro}
B. Rd || {Rs*(1+gm * ro) + 2ro}
C. Rd || {Rs*(1+gm * ro) – ro}
D. Rd || {Rs*(2+gm * ro) + ro}
Answer» B. Rd || {Rs*(1+gm * ro) + 2ro}
Discussion
8.

If channel length modulation is neglected, what is the voltage gain for the following CG stage?

A. Rd/(1/gm – Rs)
B. Rd/(3/gm + Rs)
C. Rd/(1/gm + Rs)
D. Rd/(2/gm + Rs)
Answer» D. Rd/(2/gm + Rs)
Discussion
9.

If channel length modulation is present, what is the output impedance of the following circuit?

A. Rd
B. Rd || ro
C. ro
D. 0
Answer» C. ro
Discussion
10.

If channel length modulation is neglected, what is the voltage gain for the following circuit from source to drain?

A. gm * Rd
B. gm * ro
C. gm * (ro || Rd)
D. -gm * Rd
Answer» B. gm * ro
Discussion
11.

What is the input impedance for the following circuit?

A. ro
B. 1/gm
C. Rd || ro
D. Infinite
Answer» C. Rd || ro
Discussion
12.

If Channel Length modulation is neglected, what is the voltage gain from the source to the drain for the CG stage shown below?

A. gm * Rd * {2Rs / (Rs + 1/gm)}
B. gm * Rd * {Rs / (Rs + 2/gm)}
C. gm * Rd * {2Rs / (Rs – 1/gm)}
D. gm * Rd * {Rs / (Rs + 1/gm)}
Answer» E.
Discussion
13.

What is the input impedance of the following CG stage?

A. 1/gm
B. 2* Rs || 1/gm
C. Rs || 1/gm
D. Rs || 2/gm
Answer» D. Rs || 2/gm
Discussion
14.

In the following circuit, what is the voltage at the source of the M1?

A. Vin * Rs / (Rs + 1/gm)
B. Vin * Rs / (Rs + gm)
C. Vin * Rs / (Rs – 1/gm)
D. Vin * Rs / (Rs + 2/gm)
Answer» B. Vin * Rs / (Rs + gm)
Discussion